...because we can't all be on the bleeding edge...





450L2 CACHE

UNIDENTIFIED

450L2 CACHE

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

20/25/33/50 (Internal)/50/66 (Internal)MHz

Chip Set

OPTI

Max. onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

32-bit local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo LED

JP10

Speaker

J17

32-bit local bus slot

S1

Power LED & keylock

J18

 

S2

Turbo switch

JP9

Reset

SW1

Note:The exact locations of local bus slots S1 and S2 are unknown.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP1

pins 2 & 3 closed

 

CMOS memory clear

JP1

pins 1 & 2 closed

Monitor type select color

JP2

Closed

 

Monitor type select monochrome

JP2

Open

Ready signal select ISA

JP3 & JP4

pins 1 & 2 closed

 

Ready signal select Local bus

JP3 & JP4

pins 2 & 3 closed

CPU upgrade (486PQFP to 486PGA) enabled

JP17

Closed

 

CPU upgrade (486PQFP to 486PGA) disabled

JP17

Open

Note:The location of jumpers JP3 and JP4 is unknown.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U39)

TAG (U40)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP8

JP15

JP16

64KB

Open

Open

Open

pins 2 & 3

Open

Open

128KB

Closed

Open

Closed

pins 1 & 2

Open

Closed

256KB

Closed

Closed

Closed

pins 2 & 3

Closed

Closed

CPU SPEED CONFIGURATION

Speed

JP11

JP12

JP13

JP14

20MHz

Closed

Closed

Open

Open

25MHz

Open

Closed

Open

Closed

33MHz

Open

Open

Closed

Closed

50i MHz

Open

Closed

Open

Closed

50MHz

Open

Open

Closed

Open

66MHz

Open

Open

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP18

JP19

JP20

80486SX PQFP

Open

Closed

pins 2 & 3 closed

80486SX PGA

Open

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

80486DX

pins 1 & 2 closed

Closed

pins 1 & 2 closed

ODP486SX

Open

Open

pins 2 & 3 closed

80486DX2

pins 1 & 2 closed

Closed

pins 1 & 2 closed